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mantissa 05-04-2013 06:17 PM

VCT not completely set - help on possible reasons why?
I put VCT in a large closet I have. Before I put it down I put down a new plywood underlayment. I used Roberts 2057 adhesive with armstrong tile - used the recommended trowel size and let it dry clear. After all was put in I used a rented 100lb roller and let it set for a few days before walking on it. It's still empty so theirs no weight on it now.

Now about a month and a half later I was in the closet with a ladder to get in the attic and the pressure from the ladder moved the edge pieces. Upon investigation I found they are sliding out of place with enough side pressure. I have no idea why they haven't set as I followed the instructions I've found to a t. Any suggestions/advice as to what could cause this?


sam floor 05-04-2013 08:07 PM

You let the adhesive dry completely before you installed the tile?

mantissa 05-04-2013 09:07 PM


Originally Posted by sam floor (Post 1172650)
You let the adhesive dry completely before you installed the tile?

Yes. I troweled it on and waited till it turned clear. It was tacky to the touch but dry I believe.

JazMan 05-04-2013 09:43 PM

Those type of vinyl tiles with that kind of adhesive need traffic to stick better. They stick by making contact. Of course the edge tiles rarely get walked on, so they don't bond as well. Still after a while their own weight should be enough to get a good bond.

Possible reasons; The floor may not be flat and the tiles aren't touching the adhesive, the floor is too cold, the tiles laid too tight. Sometimes they take several weeks or longer to flex into the adhesive.


pgc555 05-05-2013 07:26 AM

These were dry back Armstrong tiles, Right? Probably 1/8"?
They do like to be warm to lay down. Sure that you don't have any
moisture issues?

mantissa 05-06-2013 12:00 PM

Thank you Jaz for the list of possible reasons. The floor is definitly flat so that's not it and I'm in Texas so cold is definitely note an issue. However being in a closet they aren't getting much weight so that's on the list.

Correct pgc555 - dry back Armstrong. It was warmish when they went in - maybe around 60 or 70 F. I don't believe I have moisture issues - dry closet, no pipes. Can you give me pointers on what to be looking for in regard to possible moisture issues? The floor is over a crawl space so would moisture include humidity (which we do have in Texas)? It can get pretty hot in humid in the crawl space.

Thank you all for your help.

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